Arms of the Commonwealth of Australia, based on those authorised by Royal Warrant 19 September 1912 - composed of a shield divided into six parts, each containing a representation of the badge of a State.

The shield is supported by a kangaroo and an emu. The shield sits on the denomination numerals, 50 [cents]; above the shield is the Federation star. The entire design is set above a field of stylized wattle leaves. The artist's initials SD are in the field below the numerals.